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An orthotropic steel bridge deck roof fatigue crack detection system based on ultrasonic guided wave method

An ultrasonic guided wave, orthotropic technology, applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, material analysis using sonic/ultrasonic/infrasonic waves, and measuring devices, etc. question

Active Publication Date: 2020-05-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that it is difficult to realize the comprehensive detection of the orthotropic steel bridge deck under the condition of non-destructive in the detection of the existing orthotropic steel bridge deck, and now provides an orthotropic steel bridge based on the ultrasonic guided wave method Panel Roof Fatigue Crack Detection System

Method used

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  • An orthotropic steel bridge deck roof fatigue crack detection system based on ultrasonic guided wave method
  • An orthotropic steel bridge deck roof fatigue crack detection system based on ultrasonic guided wave method
  • An orthotropic steel bridge deck roof fatigue crack detection system based on ultrasonic guided wave method

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specific Embodiment approach 1

[0047] Specific implementation mode one: refer to image 3 Describe this embodiment in detail. A fatigue crack detection system for orthotropic steel bridge deck roof deck based on the ultrasonic guided wave method described in this embodiment includes a detection part and a control part, and the detection part includes: a bracket and a transducer unit, the control part includes: a signal transceiving unit, a control unit and a signal processing unit.

[0048] The bracket is used to carry the transducer unit, and is adsorbed on the bottom of the steel box girder top plate 9 to be tested through the magnetic wheel set, so that the transducer unit can be close to or close to the bottom of the steel box girder top plate 9 to be tested, and can also drive The transducer unit moves along the length direction of the steel box girder U-shaped rib 10, the transducer unit includes at least one transducer 51, and the transducer 51 is used to excite the ultrasonic guided wave signal in t...

specific Embodiment approach 2

[0067] Specific implementation mode two: refer to Figure 4 , 6 , 7 and 8 specifically illustrate this embodiment. This embodiment is a further description of a fatigue crack detection system for orthotropic steel bridge deck roofs based on the ultrasonic guided wave method described in Embodiment 1. In this embodiment, The support includes a frame 1 and at least one transducer connecting rod 5, and the transducer connecting rod 5 has the same number as the transducer 51;

[0068] The frame 1 is provided with two groups of mirror-symmetric rod groups, each group of rod groups includes k wheel connecting rods parallel to each other and arranged along a straight line, k is a positive integer, and the free end of each wheel connecting rod is There is a magnetic wheel set, the transducer connecting rod 5 is fixed on the frame 1, and is parallel to the connecting rod of the wheel set, the free end of each wheel set connecting rod is sleeved with a rigid limiter 4, and the rigid li...

specific Embodiment approach 3

[0069] Specific embodiment three: This embodiment is a further description of a fatigue crack detection system based on the ultrasonic guided wave method described in the second specific embodiment, orthotropic steel bridge deck top plate fatigue crack detection system, in this embodiment, when k=2 The frame 1 includes at least one connecting beam 12 and two U-shaped frames 11, the two U-shaped frames 11 are mirror-symmetrically arranged, and the planes where they are located are parallel to each other, and the two U-shaped frames 11 are fixedly connected to each other through the connecting beam 12. The energy device connecting rod 5 is fixed on the connecting beam 12, and the bar at the free end of the U-shaped frame 11 is used as the wheel set connecting rod.

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Abstract

The invention discloses an orthotropic steel bridge deck slab roof fatigue crack detection system based on an ultrasonic guided wave method, and relates to the technical fields of nondestructive testing and ultrasonic testing. The invention aims to solve the problem that comprehensive detection of an orthotropic steel bridge deck slab is difficult to realize under the condition of no damage when an existing orthotropic steel bridge deck is detected. According to the orthotropic steel bridge deck slab roof fatigue crack detection system based on the ultrasonic guided wave method, a transducer is driven to detect any position by freely walking under a deck to be detected through a support under the condition without damaging the structure to be detected, so that the purpose of comprehensivedetection is achieved. The system can realize nondestructive, automatic, accurate, efficient and quantitative detection of fatigue cracks in areas which are difficult to detect visually at present, and provides necessary information for subsequent repair and reinforcement.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing and ultrasonic testing, and in particular relates to the detection of fatigue cracks on the top plate of orthotropic steel bridge decks. Background technique [0002] Orthotropic steel bridge decks are widely used in various types of bridge projects at home and abroad because of their excellent mechanical properties, performance and economical advantages. However, due to the complex structure of the orthotropic steel bridge deck, there are many connections and welding parts between the components. The fatigue problem of the anisotropic steel bridge deck is prominent, and the fatigue cracking problem occurs frequently. Fatigue cracks in orthotropic steel bridge decks have the characteristics of universality, concealment, and dispersion. If fatigue cracks appear and are not dealt with in time, they will expand rapidly and develop into large-scale cracks, which pose a serious threat ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N29/22G01N29/265G01N29/44
CPCG01N29/04G01N29/225G01N29/265G01N29/4454G01N2291/0289
Inventor 周文松李惠王鹏
Owner HARBIN INST OF TECH
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